Payment gateway of ShopThruPost does not support TLS v1.0 now for security reason.

We find that TLS v1.1 or above is not enabled in your web browser.
Therefore, you may not be able to complete the payment process in ShopThruPost.

If your web browser support TLS v1.1 or above,
please check and ensure it was enabled before proceed to payment.

If your web browser does not support TLS v1.1 or above,
please update your web browser to the latest version
or install a web browser which support TLS v1.1 or above.
The latest version of most popular web browsers enabled TLS v1.1 or above by default.

For your reference,
the latest version of build-in web browser for the following operating system enabled TLS v1.1 or above by default: